The graph between the resistive force F acting on a body and the distance covered by the body is shown is shown in the figure. The mass of the body is 60 kg and the initial velocity is 3m/s. When the distance covered by the body is 4m, its kinetic energy will be
250 J
230 J
200 J
220 J
As we learnt in
Kinetic energy -
- wherein
kinetic Energy is never negative
Work done against resistance force = Area between F-x graph
Final K.E. = 270 - 40 = 230 J
Option 1)
250 J
Incorrect
Option 2)
230 J
Correct
Option 3)
200 J
Incorrect
Option 4)
220 J
Incorrect